From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail.loongson.cn (mail.loongson.cn [114.242.206.163]) by smtp.subspace.kernel.org (Postfix) with ESMTP id C6AB584D34 for ; Fri, 20 Jun 2025 02:06:54 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=114.242.206.163 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1750385217; cv=none; b=tFe6ryOe04JKTYVP/SPKPdliHf3+KKoDqMVIkmsJAXRRgPK2Bs3sfcf/RjeEJK2ek+KDoVCLYcDq7PH+c6WwLHa4suwlncqOKtY7fg2ZFuH7bCZfyFKZgEx5vMVCpLRcesDidfKrPwFFR0WkSuhGMMLDHeWX0M+em1xUC6xixTc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1750385217; c=relaxed/simple; bh=XSg9qU078yqZglExY8CcdMafbOGnKGxVjojhbG8A2Ak=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=bqrCOGjbBlC78nLli5WMSt4Ic1YK1Lmuic2vIkGZ2vL9LNo4Smz8BsCd53ZO5ltSeVyApQcr550ZN0+crKSzeJzqDWqajvkRNSrkYGuszP8ej8Id9Vk1z8JT8jt2faNZVSA4j7ZOIWqpArSyo3352MjUO4QrDh3IMigPMcARVaA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=loongson.cn; spf=pass smtp.mailfrom=loongson.cn; arc=none smtp.client-ip=114.242.206.163 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=loongson.cn Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=loongson.cn Received: from loongson.cn (unknown [223.64.68.149]) by gateway (Coremail) with SMTP id _____8AxnOI4wlRoTCMaAQ--.24141S3; Fri, 20 Jun 2025 10:06:48 +0800 (CST) Received: from localhost.localdomain (unknown [223.64.68.149]) by front1 (Coremail) with SMTP id qMiowMCx7MQuwlRodNIhAQ--.36930S2; Fri, 20 Jun 2025 10:06:39 +0800 (CST) From: Binbin Zhou To: Binbin Zhou , Huacai Chen , Lee Jones , Corey Minyard Cc: Huacai Chen , Xuerui Wang , loongarch@lists.linux.dev, linux-kernel@vger.kernel.org, openipmi-developer@lists.sourceforge.net, jeffbai@aosc.io, kexybiscuit@aosc.io, wangyao@lemote.com, Binbin Zhou Subject: [PATCH v5 0/3] LoongArch: Add Loongson-2K BMC support Date: Fri, 20 Jun 2025 10:06:26 +0800 Message-ID: X-Mailer: git-send-email 2.47.1 Precedence: bulk X-Mailing-List: loongarch@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CM-TRANSID:qMiowMCx7MQuwlRodNIhAQ--.36930S2 X-CM-SenderInfo: p2kr3uplqex0o6or00hjvr0hdfq/ X-Coremail-Antispam: 1Uk129KBj93XoWxJF13CF1fuw1DKFW3Kw1kXrc_yoWrWr4rpa 15CFsxCr4DKFW7JrZ3Z34xuFWavas5Ja4rKr17A345ZF4UCa40yrWrKa45XFy7AF4kGry2 qrs3Jr4Ska45Z3gCm3ZEXasCq-sJn29KB7ZKAUJUUUU7529EdanIXcx71UUUUU7KY7ZEXa sCq-sGcSsGvfJ3Ic02F40EFcxC0VAKzVAqx4xG6I80ebIjqfuFe4nvWSU5nxnvy29KBjDU 0xBIdaVrnRJUUUBYb4IE77IF4wAFF20E14v26r1j6r4UM7CY07I20VC2zVCF04k26cxKx2 IYs7xG6rWj6s0DM7CIcVAFz4kK6r1Y6r17M28lY4IEw2IIxxk0rwA2F7IY1VAKz4vEj48v e4kI8wA2z4x0Y4vE2Ix0cI8IcVAFwI0_Gr0_Xr1l84ACjcxK6xIIjxv20xvEc7CjxVAFwI 0_Gr0_Cr1l84ACjcxK6I8E87Iv67AKxVWxJr0_GcWl84ACjcxK6I8E87Iv6xkF7I0E14v2 6F4UJVW0owAaw2AFwI0_Jrv_JF1le2I262IYc4CY6c8Ij28IcVAaY2xG8wAqjxCEc2xF0c Ia020Ex4CE44I27wAqx4xG64xvF2IEw4CE5I8CrVC2j2WlYx0E2Ix0cI8IcVAFwI0_JF0_ Jw1lYx0Ex4A2jsIE14v26r1j6r4UMcvjeVCFs4IE7xkEbVWUJVW8JwACjcxG0xvY0x0EwI xGrwCY1x0262kKe7AKxVWUAVWUtwCF04k20xvY0x0EwIxGrwCFx2IqxVCFs4IE7xkEbVWU JVW8JwCFI7km07C267AKxVWUXVWUAwC20s026c02F40E14v26r1j6r18MI8I3I0E7480Y4 vE14v26r106r1rMI8E67AF67kF1VAFwI0_Jw0_GFylIxkGc2Ij64vIr41lIxAIcVC0I7IY x2IY67AKxVWUJVWUCwCI42IY6xIIjxv20xvEc7CjxVAFwI0_Jr0_Gr1lIxAIcVCF04k26c xKx2IYs7xG6r1j6r1xMIIF0xvEx4A2jsIE14v26r1j6r4UMIIF0xvEx4A2jsIEc7CjxVAF wI0_Jr0_GrUvcSsGvfC2KfnxnUUI43ZEXa7IU8HKZJUUUUU== Hi all: This patch set introduces the Loongson-2K BMC. It is a PCIe device present on servers similar to the Loongson-3 CPUs. And it is a multifunctional device (MFD), such as display as a sub-function of it. For IPMI, according to the existing design, we use software simulation to implement the KCS interface registers: Stauts/Command/Data_Out/Data_In. Also since both host side and BMC side read and write kcs status, we use fifo pointer to ensure data consistency. For the display, based on simpledrm, the resolution is read from a fixed position in the BMC since the hardware does not support auto-detection of the resolution. Of course, we will try to support multiple resolutions later, through a vbios-like approach. Especially, for the BMC reset function, since the display will be disconnected when BMC reset, we made a special treatment of re-push. Based on this, I will present it in four patches: patch-1: BMC device PCI resource allocation. patch-2: BMC reset function support patch-3: IPMI implementation Thanks. ------- V5: - Rebase on linux-ipmi/for-next branch. - Rebase on linux-mfd/for-mfd-next branch. Patch (1/3): - Rename ls2kbmc-mfd.c to ls2k-bmc-core.c; - Rename MFD_LS2K_BMC to MFD_LS2K_BMC_CORE and update its help text. Patch (3/3): - Add an IPMI_LS2K config in the IPMI section that enables the IPMI interface and selects MFD_LS2K_BMC_CORE. Link to V4: https://lore.kernel.org/all/cover.1749731531.git.zhoubinbin@loongson.cn/ V4: - Add Reviewed-by tag; - Change the order of the patches. Patch (1/3): - Fix build warning by lkp: Kconfig tristate -> bool - https://lore.kernel.org/all/202505312022.QmFmGE1F-lkp@intel.com/ - Update commit message; - Move MFD_LS2K_BMC after MFD_INTEL_M10_BMC_PMCI in Kconfig and Makefile. Patch (2/3): - Remove unnecessary newlines; - Rename ls2k_bmc_check_pcie_connected() to ls2k_bmc_pcie_is_connected(); - Update comment message. Patch (3/3): - Remove unnecessary newlines. Link to V3: https://lore.kernel.org/all/cover.1748505446.git.zhoubinbin@loongson.cn/ V3: Patch (1/3): - Drop "MFD" in title and comment; - Fromatting code; - Add clearer comments. Patch (2/3): - Rebase linux-ipmi/next tree; - Use readx()/writex() to read and write IPMI data instead of structure pointer references; - CONFIG_LOONGARCH -> MFD_LS2K_BMC; - Drop unused output. Patch (3/3): - Inline the ls2k_bmc_gpio_reset_handler() function to ls2k_bmc_pdata_initial(); - Add clearer comments. - Use proper multi-line commentary as per the Coding Style documentation; - Define all magic numbers. Link to V2: https://lore.kernel.org/all/cover.1747276047.git.zhoubinbin@loongson.cn/ V2: - Drop ls2kdrm, use simpledrm instead. Patch (1/3): - Use DEFINE_RES_MEM_NAMED/MFD_CELL_RES simplified code; - Add resolution fetching due to replacing the original display solution with simpledrm; - Add aperture_remove_conflicting_devices() to avoid efifb conflict with simpledrm. Patch (3/3): - This part of the function, moved from the original ls2kdrm to mfd; - Use set_console to implement the Re-push display function. Link to V1: https://lore.kernel.org/all/cover.1735550269.git.zhoubinbin@loongson.cn/ Binbin Zhou (3): mfd: ls2kbmc: Introduce Loongson-2K BMC core driver mfd: ls2kbmc: Add Loongson-2K BMC reset function support ipmi: Add Loongson-2K BMC support drivers/char/ipmi/Kconfig | 7 + drivers/char/ipmi/Makefile | 1 + drivers/char/ipmi/ipmi_si.h | 7 + drivers/char/ipmi/ipmi_si_intf.c | 4 + drivers/char/ipmi/ipmi_si_ls2k.c | 189 ++++++++++++ drivers/mfd/Kconfig | 11 + drivers/mfd/Makefile | 2 + drivers/mfd/ls2k-bmc-core.c | 485 +++++++++++++++++++++++++++++++ 8 files changed, 706 insertions(+) create mode 100644 drivers/char/ipmi/ipmi_si_ls2k.c create mode 100644 drivers/mfd/ls2k-bmc-core.c base-commit: 8ffcb7560b4a15faf821df95e3ab532b2b020f8c -- 2.47.1